Blockchain technology is currently widely applied in industries such as finance and supply chain management. However, Delegated Proof-of-Stake (DPoS) Consensus mechanisms as the core technology of blockchain face several opening challenges, including: (1) the centralization trend exacerbated by high-weight nodes continuously producing blocks; (2) the inability of low-stake honest nodes to join the committee; (3) the failure to promptly and effectively remove malicious nodes from the committee in traditional DPoS consensus mechanisms. To address these issues, we propose a Fair Delegated Proof-of-Stake Consensus Algorithm Based on Dynamic Reputation Authorization (DR-DPoS). First, a voting reputation model is introduced to replace the stake-based voting mechanism in traditional DPoS, giving honest nodes a fair chance to join the committee, thereby decentralizing high-weight nodes. Second, Set up a validation reputation model to give low-weight, honest nodes that actively participate in validation more opportunities to enter the committee. Finally, Set up a buffered penalty model to exclude malicious nodes from the committee. Experimental results demonstrate that DR-DPoS significantly increases the proportion of low-stake honest nodes, accounting for approximately 38.1%. The average decentralization rate reaches 76.2%, and compared to traditional DPoS, DR-DPoS improves the malicious node removal rate by 86.4%.